@book { DemographischerWandelundpolitischeAntworteninDeutschland,
    title = "Demographischer Wandel und politische Antworten in Deutschland",
    author = "Gitte {Halder}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105124"
}